Is it available in sufficient quantity?
这东西能不能足量供应?
However, it is unclear whether these positrons can escape from the stellar debris in sufficient quantity to explain the size of the observed cloud.
然而,尚不清楚是否有足够数量的正电子能够逃离恒星残骸以解释观察得到云团的大小。
In sufficient quantity, it can form a sandy, green deposit such as the Cretaceous greensands of the us and UK.
在数量充分时,海绿石能形成为砂质、绿色的沉积物,如美国及英国的白垩纪绿砂。
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